DIY 4way full frontloaded Hornsystem with MDF tractrix horns

[angeloitacare]

hi all

i am building a 4way, full frontloaded Hornsystem. It will be a pair of hornloaded subwoofers, and a pair of 3 way satellites. midbass and midrange channel will use round MDF tractrix horns. At the moment i am working on the midbass horn channel. To turn it, i made a big lathe. The mouth part of the 38" horn weights over 50kgs. Fotos and videos :

http://www.flickr.com/photos/12312992@N07/page1/

Angelo

[felixx]

Very nice.
I'm interested to build or buy a pair of wood tractrix to be able to cross on 800hz.I will use 12" woofer and also a supertweeter.
I wonder how large the mouth will be?

[angeloitacare]

hi Felixx

i made some time ago a drawing, to visualize cut off fc of horns of different size. 800hz: 300mm, 12", diameter mouth size is ok.

Angelo

[felixx]

That will help Angelo.Thanks a lot.
Also,do you consider the round shape of the horn,in my case 12"-800hzcross,could be easy to build and it possible to have any "sonic" advantages comparing with horizontal horns?

http://www.geocities.jp/arai401204/H..._Speakers.html

I want to choose the "right way"....if there will be one...

[angeloitacare]

hy felixx

i can only talk from my experience. I had Altec 811 horns, Altec 1003, multicell horn, and at last tractrix horns. Tractrix horns have in my opinion less colorations, and deliver better stereo imaging. You might also consider shorter horns, like JMMLC flare horns. These horns honk less, and sound more natural.

Angelo

[Inductor]

Hi Angelo (Oi),
I saw your pages of AudioVoice Acoustics (linked by you here on top of the thread), is this yours?
It amazes me to see all the work you had for such nice results. Very impresive. Congratulations! Keep us posted.

[felixx]

Angelo...I have Altec 414-16B woofers,a pair of 811-B horns and a pair of 806A compresion drivers and I want to build the best possible and without major compromise project for them.

You might also consider shorter horns, like JMMLC flare horns. These horns honk less, and sound more natural.

J.M. Le Cleach have a concrete-cement horn in top of the Onken-Jensen enclosure.


Also on ebay :
http://cgi.ebay.co.uk/Spheric-Wave-T...QQcmdZViewItem

What is your oppinion about these...

[angeloitacare]

i think you will get nice results with these horns, certainly much better than with the actual Altec horns you use now. Consider also Azura horns, with JMMLC flare.

Angelo

[SunRa]

Hello Angelo,

I am glad you have opened a new thread. The videos with the big horn you've posted (the last two) are having a LeCleach profile? They seem very short. Are you using a 8" midrange with them? Or you are making the horn from to pieces and it's for a compression driver? It looks great anyway...

[angeloitacare]

The midbass horn has a normal tractrix profile, but a littlebit more curved on the edge, similar to JMMLC. The horn cannot be turned as one peace. The lathe would not support it. The mouth part is turned separately, and afterwards another two blocks, and then the 3 blocks are glued together. See the last pages on my blog. There is a tutorial step by step, how to build them. I will employ a Fane Studio 8m, 8" driver.

Angelo